Geoffrey Perret Books

Days of Sadness

By Geoffrey Perret

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Days of Sadness, Years of Triumph

By Geoffrey Perret

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There s a War to Be Won

By Geoffrey Perret

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There's a War to Be Won

By Geoffrey Perret

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THERE'S A WAR TO BE WON is the landmark story of one of the greatest armies in history, a conscript force of amateur soldiers who had an unparalleled record of combat success. Here -- for the first...

Commander in Chief

By Geoffrey Perret

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Commander in Chief

By Geoffrey Perret

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Eisenhower

By Geoffrey Perret

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"This new, in-depth life of Eisenhower offers fresh perspectives, not only on World War II and the Korean War but also on the Cold War, the civil rights movement, McCarthyism, the U-2 crisis and Vi...

Jack: A Life Like No Other

By Geoffrey Perret

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"Previous biographies of John F. Kennedy have been based almost entirely on newspaper files and personal recollections. Geoffrey Perret's Jack is both the first comprehensive one-volume biography...

Lincoln's War: The Untold Story of America's Greatest President as Commander in Chief

By Geoffrey Perret

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Winged Victory

By Geoffrey Perret

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.